Re-land: Update json_schema_compiler to handle the Automation extension API

chrome/browser/resources/chromeos/chromevox/cvox2/background/desktop_automation_handler.js

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /**
  * @fileoverview Handles automation from a desktop automation node.
  */
 
 goog.provide('DesktopAutomationHandler');
 
 goog.require('AutomationObjectConstructorInstaller');
 goog.require('BaseAutomationHandler');
 goog.require('ChromeVoxState');
+goog.require('CustomAutomationEvent');
 goog.require('Stubs');
 goog.require('editing.TextEditHandler');
 
 goog.scope(function() {
 var AutomationEvent = chrome.automation.AutomationEvent;
 var AutomationNode = chrome.automation.AutomationNode;
 var Dir = constants.Dir;
 var EventType = chrome.automation.EventType;
 var RoleType = chrome.automation.RoleType;
 
@@ skipping 12 matching lines @@
    */
   this.textEditHandler_ = null;
 
   /**
    * The last time we handled a value changed event.
    * @type {!Date}
    * @private
    */
   this.lastValueChanged_ = new Date(0);
 
-  var e = EventType;
-  this.addListener_(e.activedescendantchanged, this.onActiveDescendantChanged);
-  this.addListener_(e.alert, this.onAlert);
-  this.addListener_(e.ariaAttributeChanged, this.onAriaAttributeChanged);
-  this.addListener_(e.autocorrectionOccured, this.onEventIfInRange);
-  this.addListener_(e.checkedStateChanged, this.onCheckedStateChanged);
-  this.addListener_(e.childrenChanged, this.onActiveDescendantChanged);
-  this.addListener_(e.expandedChanged, this.onEventIfInRange);
-  this.addListener_(e.focus, this.onFocus);
-  this.addListener_(e.hover, this.onHover);
-  this.addListener_(e.invalidStatusChanged, this.onEventIfInRange);
-  this.addListener_(e.loadComplete, this.onLoadComplete);
-  this.addListener_(e.menuEnd, this.onMenuEnd);
-  this.addListener_(e.menuListItemSelected, this.onEventIfSelected);
-  this.addListener_(e.menuStart, this.onMenuStart);
-  this.addListener_(e.rowCollapsed, this.onEventIfInRange);
-  this.addListener_(e.rowExpanded, this.onEventIfInRange);
-  this.addListener_(e.scrollPositionChanged, this.onScrollPositionChanged);
-  this.addListener_(e.selection, this.onSelection);
-  this.addListener_(e.textChanged, this.onTextChanged);
-  this.addListener_(e.textSelectionChanged, this.onTextSelectionChanged);
-  this.addListener_(e.valueChanged, this.onValueChanged);
+  this.addListener_(EventType.ACTIVEDESCENDANTCHANGED,
+                    this.onActiveDescendantChanged);
+  this.addListener_(EventType.ALERT,
+                    this.onAlert);
+  this.addListener_(EventType.ARIA_ATTRIBUTE_CHANGED,
+                    this.onAriaAttributeChanged);
+  this.addListener_(EventType.AUTOCORRECTION_OCCURED,
+                    this.onEventIfInRange);
+  this.addListener_(EventType.CHECKED_STATE_CHANGED,
+                    this.onCheckedStateChanged);
+  this.addListener_(EventType.CHILDREN_CHANGED,
+                    this.onActiveDescendantChanged);
+  this.addListener_(EventType.EXPANDED_CHANGED,
+                    this.onEventIfInRange);
+  this.addListener_(EventType.FOCUS,
+                    this.onFocus);
+  this.addListener_(EventType.HOVER,
+                    this.onHover);
+  this.addListener_(EventType.INVALID_STATUS_CHANGED,
+                    this.onEventIfInRange);
+  this.addListener_(EventType.LOAD_COMPLETE,
+                    this.onLoadComplete);
+  this.addListener_(EventType.MENU_END,
+                    this.onMenuEnd);
+  this.addListener_(EventType.MENU_LIST_ITEM_SELECTED,
+                    this.onEventIfSelected);
+  this.addListener_(EventType.MENU_START,
+                    this.onMenuStart);
+  this.addListener_(EventType.ROW_COLLAPSED,
+                    this.onEventIfInRange);
+  this.addListener_(EventType.ROW_EXPANDED,
+                    this.onEventIfInRange);
+  this.addListener_(EventType.SCROLL_POSITION_CHANGED,
+                    this.onScrollPositionChanged);
+  this.addListener_(EventType.SELECTION,
+                    this.onSelection);
+  this.addListener_(EventType.TEXT_CHANGED,
+                    this.onTextChanged);
+  this.addListener_(EventType.TEXT_SELECTION_CHANGED,
+                    this.onTextSelectionChanged);
+  this.addListener_(EventType.VALUE_CHANGED,
+                    this.onValueChanged);
 
   AutomationObjectConstructorInstaller.init(node, function() {
     chrome.automation.getFocus((function(focus) {
       if (ChromeVoxState.instance.mode != ChromeVoxMode.FORCE_NEXT)
         return;
 
       if (focus) {
-        this.onFocus(
-            new chrome.automation.AutomationEvent(
-                EventType.focus, focus, 'page'));
+        var event = new CustomAutomationEvent(EventType.FOCUS, focus, 'page');
+        this.onFocus(event);
       }
     }).bind(this));
   }.bind(this));
 };
 
 /**
  * Time to wait until processing more value changed events.
  * @const {number}
  */
 DesktopAutomationHandler.VMIN_VALUE_CHANGE_DELAY_MS = 500;
@@ skipping 110 matching lines @@
     this.onEventDefault(evt);
   },
 
   /**
    * Makes an announcement without changing focus.
    * @param {!AutomationEvent} evt
    */
   onActiveDescendantChanged: function(evt) {
     if (!evt.target.activeDescendant || !evt.target.state.focused)
       return;
-    this.onEventDefault(new chrome.automation.AutomationEvent(
-        EventType.focus, evt.target.activeDescendant, evt.eventFrom));
+    var event = new CustomAutomationEvent(
+        EventType.FOCUS, evt.target.activeDescendant, evt.eventFrom);
+    this.onEventDefault(event);
   },
 
   /**
    * Makes an announcement without changing focus.
    * @param {!AutomationEvent} evt
    */
   onAlert: function(evt) {
     var node = evt.target;
     if (!node || !this.shouldOutput_(evt))
       return;
 
     var range = cursors.Range.fromNode(node);
 
     new Output().withSpeechAndBraille(range, null, evt.type).go();
   },
 
   /**
    * Provides all feedback once a checked state changed event fires.
    * @param {!AutomationEvent} evt
    */
   onCheckedStateChanged: function(evt) {
     if (!AutomationPredicate.checkable(evt.target))
       return;
 
     Output.forceModeForNextSpeechUtterance(cvox.QueueMode.CATEGORY_FLUSH);
-    this.onEventIfInRange(
-        new chrome.automation.AutomationEvent(
-            EventType.checkedStateChanged, evt.target, evt.eventFrom));
+    var event = new CustomAutomationEvent(
+        EventType.CHECKED_STATE_CHANGED, evt.target, evt.eventFrom);
+    this.onEventIfInRange(event);
   },
 
   /**
    * Provides all feedback once a focus event fires.
    * @param {!AutomationEvent} evt
    */
   onFocus: function(evt) {
     // Invalidate any previous editable text handler state.
     this.textEditHandler_ = null;
 
     var node = evt.target;
 
     // Discard focus events on embeddedObject.
-    if (node.role == RoleType.embeddedObject)
+    if (node.role == RoleType.EMBEDDED_OBJECT)
       return;
 
     this.createTextEditHandlerIfNeeded_(evt.target);
 
     // Category flush speech triggered by events with no source. This includes
     // views.
     if (evt.eventFrom == '')
       Output.forceModeForNextSpeechUtterance(cvox.QueueMode.CATEGORY_FLUSH);
     if (!node.root)
       return;
 
     var root = AutomationUtil.getTopLevelRoot(node.root);
-
     // If we're crossing out of a root, save it in case it needs recovering.
     var prevRange = ChromeVoxState.instance.currentRange;
     var prevNode = prevRange ? prevRange.start.node : null;
     if (prevNode) {
     var prevRoot = AutomationUtil.getTopLevelRoot(prevNode);
       if (prevRoot && prevRoot !== root)
       ChromeVoxState.instance.focusRecoveryMap.set(prevRoot, prevRange);
     }
-
     // If a previous node was saved for this focus, restore it.
     var savedRange = ChromeVoxState.instance.focusRecoveryMap.get(root);
     ChromeVoxState.instance.focusRecoveryMap.delete(root);
     if (savedRange) {
       ChromeVoxState.instance.navigateToRange(savedRange, false);
       return;
     }
-
-    this.onEventDefault(new chrome.automation.AutomationEvent(
-        EventType.focus, node, evt.eventFrom));
+    var event = new CustomAutomationEvent(EventType.FOCUS, node, evt.eventFrom);
+    this.onEventDefault(event);
   },
 
   /**
    * Provides all feedback once a load complete event fires.
    * @param {!AutomationEvent} evt
    */
   onLoadComplete: function(evt) {
     chrome.automation.getFocus(function(focus) {
       if (!focus || !AutomationUtil.isDescendantOf(focus, evt.target))
         return;
@@ skipping 13 matching lines @@
       }
 
       // If initial focus was already placed on this page (e.g. if a user starts
       // tabbing before load complete), then don't move ChromeVox's position on
       // the page.
       if (ChromeVoxState.instance.currentRange &&
           ChromeVoxState.instance.currentRange.start.node.root == focus.root)
         return;
 
       var o = new Output();
-      if (focus.role == RoleType.rootWebArea) {
+      if (focus.role == RoleType.ROOT_WEB_AREA) {
         // Restore to previous position.
         var url = focus.docUrl;
         url = url.substring(0, url.indexOf('#')) || url;
         var pos = cvox.ChromeVox.position[url];
         if (pos) {
           focus = AutomationUtil.hitTest(focus.root, pos) || focus;
           if (focus != focus.root)
             o.format('$name', focus.root);
         }
       }
@@ skipping 41 matching lines @@
     if (!ChromeVoxState.instance.currentRange) {
       this.onEventDefault(evt);
       ChromeVoxState.instance.setCurrentRange(
           cursors.Range.fromNode(evt.target));
     }
 
     this.createTextEditHandlerIfNeeded_(evt.target);
 
     // Sync the ChromeVox range to the editable, if a selection exists.
     var anchorObject = evt.target.root.anchorObject;
-    var anchorOffset = evt.target.root.anchorOffset;
+    var anchorOffset = evt.target.root.anchorOffset || 0;
     var focusObject = evt.target.root.focusObject;
-    var focusOffset = evt.target.root.focusOffset;
+    var focusOffset = evt.target.root.focusOffset || 0;
     if (anchorObject && focusObject) {
       var selectedRange = new cursors.Range(
           new cursors.WrappingCursor(anchorObject, anchorOffset),
           new cursors.WrappingCursor(focusObject, focusOffset));
 
       // Sync ChromeVox range with selection.
       ChromeVoxState.instance.setCurrentRange(selectedRange);
     }
 
     // TODO(plundblad): This can currently be null for contenteditables.
@@ skipping 11 matching lines @@
     if (evt.target.state.editable) {
       this.onEditableChanged_(evt);
       return;
     }
 
     if (!this.shouldOutput_(evt))
       return;
 
     var t = evt.target;
     if (t.state.focused ||
-        t.root.role == RoleType.desktop ||
+        t.root.role == RoleType.DESKTOP ||
         AutomationUtil.isDescendantOf(
             ChromeVoxState.instance.currentRange.start.node, t)) {
       if (new Date() - this.lastValueChanged_ <=
           DesktopAutomationHandler.VMIN_VALUE_CHANGE_DELAY_MS)
         return;
 
       this.lastValueChanged_ = new Date();
 
       var output = new Output();
 
-      if (t.root.role == RoleType.desktop)
+      if (t.root.role == RoleType.DESKTOP)
         output.withQueueMode(cvox.QueueMode.FLUSH);
 
       output.format('$value', evt.target).go();
     }
   },
 
   /**
    * Handle updating the active indicator when the document scrolls.
    * @param {!AutomationEvent} evt
    */
   onScrollPositionChanged: function(evt) {
     var currentRange = ChromeVoxState.instance.currentRange;
     if (currentRange && currentRange.isValid() && this.shouldOutput_(evt))
       new Output().withLocation(currentRange, null, evt.type).go();
   },
 
   /**
    * @param {!AutomationEvent} evt
    */
   onSelection: function(evt) {
     // Invalidate any previous editable text handler state since some nodes,
     // like menuitems, can receive selection while focus remains on an editable
     // leading to braille output routing to the editable.
     this.textEditHandler_ = null;
 
     chrome.automation.getFocus(function(focus) {
       // Desktop tabs get "selection" when there's a focused webview during tab
       // switching.
-      if (focus.role == RoleType.webView && evt.target.role == RoleType.tab) {
+      if (focus.role == RoleType.WEB_VIEW && evt.target.role == RoleType.TAB) {
         ChromeVoxState.instance.setCurrentRange(
             cursors.Range.fromNode(focus.firstChild));
         return;
       }
 
       // Some cases (e.g. in overview mode), require overriding the assumption
       // that focus is an ancestor of a selection target.
-      var override = evt.target.role == RoleType.menuItem ||
+      var override = evt.target.role == RoleType.MENU_ITEM ||
           (evt.target.root == focus.root &&
-              focus.root.role == RoleType.desktop);
+              focus.root.role == RoleType.DESKTOP);
       Output.forceModeForNextSpeechUtterance(cvox.QueueMode.FLUSH);
       if (override || AutomationUtil.isDescendantOf(evt.target, focus))
         this.onEventDefault(evt);
     }.bind(this));
   },
 
   /**
    * Provides all feedback once a menu start event fires.
    * @param {!AutomationEvent} evt
    */
   onMenuStart: function(evt) {
     ChromeVoxState.instance.markCurrentRange();
     this.onEventDefault(evt);
   },
 
   /**
    * Provides all feedback once a menu end event fires.
    * @param {!AutomationEvent} evt
    */
   onMenuEnd: function(evt) {
     this.onEventDefault(evt);
 
     // This is a work around for Chrome context menus not firing a focus event
     // after you close them.
     chrome.automation.getFocus(function(focus) {
       if (focus) {
-        this.onFocus(
-            new chrome.automation.AutomationEvent(
-                EventType.focus, focus, 'page'));
+        var event = new CustomAutomationEvent(EventType.FOCUS, focus, 'page');
+        this.onFocus(event);
       }
     }.bind(this));
   },
 
   /**
    * Create an editable text handler for the given node if needed.
    * @param {!AutomationNode} node
    */
   createTextEditHandlerIfNeeded_: function(node) {
     if (!this.textEditHandler_ ||
         this.textEditHandler_.node !== node) {
       this.textEditHandler_ = editing.TextEditHandler.createForNode(node);
     }
   },
 
   /**
    * Once an event handler updates ChromeVox's range based on |evt|
    * which updates mode, returns whether |evt| should be outputted.
    * @return {boolean}
    */
   shouldOutput_: function(evt) {
     var mode = ChromeVoxState.instance.mode;
     // Only output desktop rooted nodes or web nodes for next engine modes.
-    return evt.target.root.role == RoleType.desktop ||
+    return evt.target.root.role == RoleType.DESKTOP ||
         (mode == ChromeVoxMode.NEXT ||
          mode == ChromeVoxMode.FORCE_NEXT ||
          mode == ChromeVoxMode.CLASSIC_COMPAT);
   }
 };
 
 /**
  * Initializes global state for DesktopAutomationHandler.
  * @private
  */
 DesktopAutomationHandler.init_ = function() {
   chrome.automation.getDesktop(function(desktop) {
     ChromeVoxState.desktopAutomationHandler =
         new DesktopAutomationHandler(desktop);
   });
 };
 
 DesktopAutomationHandler.init_();
 
 });  // goog.scope